Change Car Rear Silencer Mercedes-Benz M
Change Car Rear Silencer
| Estimated time | 1h30 |
|---|---|
| Estimated labour cost | ~150£ |
| Difficulty | Easy |
| Remove/refit the left silencer | 1h30 |
| Renew the left silencer | 1h30 |
| Remove/refit the right silencer | 1h30 |
| Renew the right silencer | 1h30 |
| Remove/refit both silencers | 1h30 |
| Renew both silencers | 1h30 |
| Repair the silencer* | 1h30 |
| Repair the front silencer* | 1h30 |
| Align the front silencer* | 0h30 |
| Remove/refit the main silencer | 1h30–3h00 |
| Renew the main silencer | 1h30–3h00 |
| Repair the main silencer | 0h30 |
| Align the main silencer* | 0h30 |
| Difficult main silencer removal* | 0h30 |
| Repair the rear silencer | 0h30 |
| Weld a sheet-metal repair panel onto the rear silencer* | 0h45 |
| Difficult rear silencer removal* | 0h30 |
| Remove/refit the silencer | 1h30 |
| Renew the silencer | 1h30 |
| Repair the main silencer* | 1h30 |
| Remove/refit the rear left silencer | 1h30–2h00 |
| Renew the rear left silencer | 1h30–2h00 |
| Remove/refit the rear right silencer | 1h30–2h00 |
| Renew the rear right silencer | 1h30–2h00 |
| Remove/refit both rear silencers | 2h00–3h00 |
| Renew both rear silencers | 2h30–3h00 |
| Remove/refit the front silencer | 1h30 |
| Renew the front silencer | 1h30 |
| Repair the front silencer | 0h30 |
| Remove/refit the rear silencer | 1h30 |
| Renew the rear silencer | 1h30 |
What is a Mercedes-Benz M rear silencer?
The rear silencer (also called the back box or rear muffler) reduces exhaust noise to an acceptable level. It is located at the end of the exhaust line, after the catalytic converter, particulate filter (if fitted), and sometimes an intermediate silencer.
When should you change the Mercedes-Benz M rear silencer?
No periodic replacement interval is specified. Carry out regular visual inspections for corrosion, holes, and deteriorated mounting rubbers. Signs that replacement is needed: louder exhaust noise, rattling from loose baffles, visible rust holes, exhaust fumes entering the cabin, or failure at the MOT/roadworthiness test.
Is it difficult to change the Mercedes-Benz M rear silencer?
Difficulty level 2/5: technically easy but may require effort if bolts and clamps are rusted. Key steps: raise the vehicle, apply penetrating oil to clamp bolts, remove the clamp connecting the silencer to the intermediate pipe, remove the mounting rubber hangers, fit the new silencer with new gasket/clamp, reattach mounting rubbers, check for leaks with engine running.
3 models covered
| Model | Year Range | Engines covered | Fuel |
|---|---|---|---|
| M 1998-2005 | 1998-2005 | 230 Petrol (111.977), 270 CDI Diesel (612.963), 320, -LPG LPG,Petrol (112.942), 350, -LPG LPG,Petrol (112.970), 400 CDI Diesel (628.963), 430, -LPG LPG,Petrol (113.942), 500, -4MATIC, -LPG LPG,Petrol (113.965), 55 AMG, -LPG LPG,Petrol (113.981) | Diesel, LPG, Petrol |
| M 2005-2011 | 2005-2011 | 280 CDI 4MATIC Diesel (642.940), 300 CDI 4MATIC Diesel (642.820), 320 CDI 4MATIC Diesel (642.940), 350 4MATIC, -LPG LPG,Petrol (272.967), 350 BlueTEC 4MATIC Diesel (642.820), 350 CDI BlueTEC 4MATIC Diesel (642.820), 420 CDI 4MATIC Diesel (629.912), 500 4MATIC, -LPG LPG,Petrol (1… | Diesel, LPG, Petrol |
| M 2011-2015 | 2011-2015 | 250 BlueTEC 4MATIC Diesel (651.960), 300 4MATIC Petrol (276.955), 350 4MATIC Petrol (276.955), 350 BlueTEC 4MATIC Diesel (642.826), 400 4MATIC Petrol (276.821), 500/550 4MATIC Petrol (278.928), 63 AMG Petrol (157.982), 63 AMG Petrol (157.982) | Diesel, Petrol |
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